On Friday, authorities charged 29-year-old Thomas Gallagher Jr. with criminal homicide. He is also facing other DUI-related charges.

The crash that killed Demko, 18, occurred on the afternoon of July 8 along Lampeter Road in West Lampeter Township.

Court papers show that Gallagher admitted to using heroin and drinking before driving on Lampeter Road in West Lampeter Township. His blood alcohol content was as high as .26.

The Lancaster County DA says Gallagher has a history of DUI, and has gone through treatment programs.

Investigators say Gallagher got behind the wheel of a Jetta anyway with two other people in it with him. Court papers show another driver honked at him as he passed her car on the berm and his passengers were yelling for him to stop.

The documents show Gallagher swerved directly into Demko's car. A witness says she didn't have a chance to get out of the way.

Gallagher is also now charged with aggravated assault, because one of his passengers broke her foot in the crash.

When you add up the maximum sentences for all of his charges he could be sentenced to more than 100 years behind bars. He is in jail on over a million dollars bail.

News 8 reached out to Gallagher's attorney and asked if Gallagher is showing any signs of remorse, but his attorney says he hasn't had the chance to talk to Gallagher about that yet.